摘要
通过对MUDS系统无线接收与发射系统的噪声来源以及传播方式的分析,探讨了传输信号参数与载噪比、误码率和传输距离之间的关系,并对临界条件下的无线数字电视状态进行了分析。指出简单增加有源放大器只能提高接收电平,但不能改善接收信噪比,距离是影响图像质量的重要参数。最后从接收电平和信噪比两个不同角度论述了改善数字电视视频图像质量的基本方法。对临界条件下的数字电视信号接收状态的深入分析能为数字MUDS系统的覆盖范围的设计提供科学依据。
In this paper, based on the analysis of noise in wireless multi-channel TV and transmitting system of Digital MUDS, the relation of the parameter of transmission signal with C/N, BER and transmission distance is discussed, and the state of the wireless multi-channel TV under critical condition is analyzed. At the same time, it is indicated that additional active amplifiers can improve receiving level only, but cannot improve receiving C/N. Finally, basic methods for improving the image quality in Digital TV MUDS systems are discussed from the points of view of receiving level, C/N and distance. The receiving of digital TV signals under critical condition is studied in depth.
出处
《电视技术》
北大核心
2006年第4期35-37,61,共4页
Video Engineering
